CN105050261A - Numerical control method of pure-solid new HID lamp's electronic ballast and circuit - Google Patents
Numerical control method of pure-solid new HID lamp's electronic ballast and circuit Download PDFInfo
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Abstract
The invention discloses a numerical control method of a pure-solid new HID lamp's electronic ballast. An input AC power supply is connected in series to a power supply circuit of a new HID lamp so as to form heavy current direct-fed AC-AC topology; the AC power supply respectively charges energy-storage capacitors C1 and C2 through AC-DC voltage doubling rectifying, and DC voltages of the two energy-storage capacitors are in forward series connection to be superposed to form DC bus voltage used for starting the new HID lamp; electronic power switches S1 and S2 are respectively controlled by push-pull work of a single-chip microcomputer to respectively finish current high-frequency positive half-wave and negative half-wave power supply; and in dead time of the two electronic power switches which are both switched-off and through a flow current process, constant power operation of the new HID lamp is realized. The pure-solid new HID lamp's electronic ballast is suitable for global AC 100-280 V industrial power supplies, can be compatible with traditional gas discharge lamps, can stably and reliably realize glow-starting and constant power operation of a new HID lamp with its lamp voltage being 250V and above, eliminates the harm of acoustic resonance, has high reliability, reduces harmonic interference and EMC interference and has high electric power efficiency.
Description
Technical field
The present invention relates to numerical control method and the circuit of pure solid-state new HID lamp electric ballast.
Background technology
HID lamp is the abbreviation of " high-intensity gas discharge lamp ", such as: xenon lamp, Metal halogen lamp, high-pressure mercury lamp, high-pressure sodium lamp, thallium vanadium receive lamp ... etc., existing ripe technique and a large amount of suitability for industrialized production equipment are produced in enormous quantities.There are the authority files such as industry standard, portion's mark, GB.So far HID is still the global high-power preferred main force of public illumination cost performance.
Although LED light effect has risen to every watt of 303 lumens, high light efficiency LED is too expensive, and high-powered LED lamp loses the advantage of point-source of light; And HID lamp and new HID lamp are all high-power point-source of lights of excellent cost performance, control photosensitiveness is fabulous.LED seems fragile, non-refractory, the not surge of resistance to induction lightening, so LED still fails to replace high-power HID lamp and new HID lamp so far comprehensively compared with HID lamp, new HID lamp.
New HID lamp is the innovation on the HID lamp basis of tradition maturation: in order to raise the efficiency, and people, for having increased high-intensity-gas pressure in HID lamp electric arc tube, promotes HID lamp arc voltage; When equal lamp power, lamp arc current declines, and lamp export license is declined, longer than traditional HID lamp life-span; Two HID electric arc tubes in parallel in a HID lamp bubble, the lamp life-span, can than the beautiful LED life-span more than 50,000 hours; Especially temperature is comparatively under high workload environmental condition, and HID resistance to elevated temperatures is better than LED; Change HID lamp electric arc tube gas formulation, optimize the formula of halogen ball in HID electric arc tube, make HID lamp color rendering close to sunlight, operability is better than LED.But new HID lamp starter difficulty, hot starter is more difficult, and the control difficulty of lamp electric arc and lamp power stability is large, potential acoustic resonance danger and disaster.
At present, it is general that new HID lamp electric ballast must adapt to exchange 100 volts to 280 volts industrial powers at universal mains, and the new HID lamp starter allowing modulating voltage 250 volts or higher that can be reliable and stable, stable, output-constant operation, technical difficulty is quite large.Old way continues to use the topology of BOOST booster type APFC reliably, can obtain voltage stabilizing 400 volts of bus direct currents, powering drives new HID lamp to full-bridge or half bridgepush pull, and this is scheme conventional both at home and abroad, but cost performance difficulty has large breakthrough, so new HID lamp electric ballast price can not be fallen at present.Be necessary the better method of innovation cost performance.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of to adapt to exchange 100 volts to 280 volts industrial powers in the whole world general, gaseous discharge lamp that can be compatible traditional, reliable and stable can allow the new HID lamp starter of 250 volts or higher modulating voltage and output-constant operation can be stablized, elimination acoustic resonance endangers, reliability is high, reduce humorous wave interference THD% and EMC interference, electric work efficiency E
ffthe numerical control method of high pure solid-state new HID lamp electric ballast and circuit.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The numerical control method of pure solid-state new HID lamp electric ballast,
Connect in the current supply circuit of new HID lamp input ac power ~ UIN, forms the AC-AC topology that forceful electric power directly presents new HID lamp;
Before new HID lamp starter, at alternating current positive half wave, input ac power ~ UIN is charged to the first storage capacitor C1 by AC-DC times of voltage commutation; Half-wave is born at alternating current, input ac power ~ UIN is charged to the second storage capacitor C2 by AC-DC times of voltage commutation, DC bus-bar voltage is that the direct voltage UC1 of the first storage capacitor C1 and the direct voltage UC2 forward overlapped in series of the second storage capacitor C2 form, for the new HID lamp of starter;
When after new HID lamp starter, first electronic power switch S1 and the second electronic power switch S2 is controlled by single-chip microprocessor MCU symmetrical operation respectively, realize new HID lamp electric current high frequency positive half wave by direct voltage UC1 series connection input ac power ~ UIN to power, realize new HID lamp electric current high frequency negative half-wave by direct voltage UC2 series connection input ac power ~ UIN and power; The Dead Time all ended whenever above-mentioned two electronic power switches is afterflow process, and this afterflow process is Active Power Factor Correction APFC process, makes new HID lamp output-constant operation;
First differential mode inductance L1 and the second differential mode inductance L2 is connected in new HID lamp electric current high frequency positive half wave current supply circuit and new HID lamp electric current high frequency negative half-wave current supply circuit respectively, and the mutual inductance effect of the two forms times current effect and acts on above-mentioned symmetrical operation process and afterflow process respectively.
Also comprise the method for stable input electric power: the output current and the output voltage that are sampled input ac power ~ UIN by the first single-chip microprocessor MCU 1 respectively, through carrying out contrast computing with the rated input power of setting, comparison result is transported to single-chip microprocessor MCU, single-chip microprocessor MCU makes dynamic adjustments to the duty cycle signals of driving first electronic power switch S1 and the second electronic power switch S2 respectively according to comparison result, and input electric power is stablized.
Also comprise the method for stable lamp power: second singlechip MCU2 samples lamp current and modulating voltage respectively, through carrying out contrast computing with the lamp rated power of setting, comparison result is transported to single-chip microprocessor MCU, single-chip microprocessor MCU makes dynamic adjustments to the duty cycle signals of driving first electronic power switch S1 and the second electronic power switch S2 respectively according to comparison result, makes lamp power stability.
Described new HID lamp electric current high frequency positive half wave current supply circuit comprise connect successively the first storage capacitor C1, the first electronic power switch S1, the first differential mode inductance L1, input ac power ~ UIN, new HID lamp, high frequency current-limiting inductance Lr, high frequency current limiting capacitance CS and current-limiting resistance RS parallel branch;
New HID lamp electric current high frequency negative half-wave current supply circuit comprises parallel branch, the high frequency current-limiting inductance Lr, newly HID lamp, input ac power ~ UIN, the second differential mode inductance L2, the second electronic power switch S2 of the second storage capacitor C2, high frequency current limiting capacitance CS and the current-limiting resistance RS connected successively.
The different name end of described first differential mode inductance L1 is connected with the Same Name of Ends of the second differential mode inductance L2.
The circuit of the numerical control method of the pure solid-state new HID lamp electric ballast described in employing, comprises AC-DC times of voltage commutation charge circuit and symmetrical operation current circuit;
1., an AC-DC times voltage commutation charge circuit work in electronic power switch S1 and S2 all not operating before, comprising:
The charging closed-loop path of the first storage capacitor C1: when the positive half wave of input ac power ~ UIN, alternating current is divided into two-way after holding output by the L of input ac power ~ UIN, from the different name end of the first differential mode inductance L1 to Same Name of Ends, then charge to the first storage capacitor C1 in one road after the first rectifier diode D1 rectification; From the Same Name of Ends of the second differential mode inductance L2 to different name end, then charge to the first storage capacitor C1 in another road after the 3rd rectifier diode D3 rectification; The charging current of the first storage capacitor C1 flows through the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, the parallel branch of starting capacitor CP and starter resistance RP successively, get back to the N end of input ac power ~ UIN, make the first storage capacitor C1 obtain direct voltage UC1;
The charging closed-loop path of the second storage capacitor C2: when the negative half-wave of input ac power ~ UIN, alternating current is held by the N of input ac power ~ UIN and is exported, flow through the parallel branch of the parallel branch of starting capacitor CP and starter resistance RP, high frequency current limiting capacitance CS and current-limiting resistance RS successively, after the second storage capacitor C2 charges, be divided into two-way, a road returns the L end of input ac power ~ UIN after the second rectifier diode D2 rectification from the different name end of the second differential mode inductance L2 to Same Name of Ends; Return the L end of input ac power ~ UIN from the Same Name of Ends of the first differential mode inductance L1 to different name end after another Lu Jing tetra-rectifier diode D4 rectification; The second storage capacitor C2 is made to obtain direct voltage UC2;
DC bus-bar voltage is that direct voltage UC1 and direct voltage UC2 forward overlapped in series form, for the new HID lamp of starter;
2., symmetrical operation current circuit is the first electronic power switch S1 and the second electronic power switch S2 current circuit when being controlled by single-chip microprocessor MCU symmetrical operation respectively, comprises new HID lamp electric current high frequency positive half wave current supply circuit, the first continuous current circuit, new HID lamp electric current high frequency negative half-wave current supply circuit and the second continuous current circuit;
New HID lamp electric current high frequency positive half wave current supply circuit comprises: when when the first electronic power switch S1 conducting, the second electronic power switch S2 ends, first pulse current flows out from the anode of the first storage capacitor C1, flow through the first electronic power switch S1, the parallel branch of Same Name of Ends to different name end, safety electric capacity Cx and input ac power ~ UIN of the first differential mode inductance L1, the parallel branch of new HID lamp, high frequency current-limiting inductance Lr, high frequency current limiting capacitance CS and current-limiting resistance RS successively, get back to the negative terminal of the first storage capacitor C1;
First continuous current circuit comprises: when the first electronic power switch S1 transfers cut-off to and the Dead Time that still ends of the second electronic power switch S2 by conducting, the first differential mode inductance L1 afterflow is given by the 4th rectifier diode D4, freewheel current flows out from the negative pole of the 4th rectifier diode D4, flow through the Same Name of Ends of the first differential mode inductance L1 successively to different name end, the parallel branch of safety electric capacity Cx and input ac power ~ UIN, new HID lamp, high frequency current-limiting inductance Lr, the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, charge to the second storage capacitor C2 again, finally get back to the positive pole of the 4th rectifier diode D4,
New HID lamp electric current high frequency negative half-wave current supply circuit comprises: when when the second electronic power switch S2 conducting, the first electronic power switch S1 ends, second pulse current flows out from the anode of the second storage capacitor C2, flow through the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, high frequency current-limiting inductance Lr, the new parallel branch of HID lamp, safety electric capacity Cx and input ac power ~ UIN, the Same Name of Ends of the second differential mode inductance L2 successively to different name end, the second electronic power switch S2, get back to the negative terminal of the second storage capacitor C2;
Second continuous current circuit comprises: when the second electronic power switch S2 transfers cut-off to and the Dead Time that still ends of the first electronic power switch S1 by conducting, the second differential mode inductance L2 afterflow is given by the 3rd rectifier diode D3, freewheel current flows out from the negative pole of the 3rd rectifier diode D3, after charging to the first storage capacitor C1, flow through successively the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, high frequency current-limiting inductance Lr, new HID lamp, the second differential mode inductance L2 Same Name of Ends to different name end, get back to the positive pole of the 3rd rectifier diode D3;
Described first electronic power switch S1 is connected single-chip microprocessor MCU respectively with the control end of the second electronic power switch S2.
Also comprise the circuit of stable input electric power: two sampling ends of the first single-chip microprocessor MCU 1 connect output current and the output voltage of input ac power ~ UIN respectively, output connects the input of single-chip microprocessor MCU, and two outputs of single-chip microprocessor MCU connect the control end of the first electronic power switch S1 and the second electronic power switch S2 respectively.
Also comprise the circuit of stable lamp power: two sampling ends connecting lamp electric current and modulating voltage respectively of second singlechip MCU2, output connects the input of single-chip microprocessor MCU, and two outputs of single-chip microprocessor MCU connect the control end of the first electronic power switch S1 and the second electronic power switch S2 respectively.
Also comprise the self-powered circuit of single-chip microprocessor MCU: by the secondary induction coil NV of the first differential mode inductance L1 and the second differential mode inductance L2 through full-wave voltage doubler, obtain low-tension current source, then connect the VCC pin of single-chip microprocessor MCU after voltage stabilizing didoe ZV voltage stabilizing.
Also comprise the circuit reducing EMC interference: one end of new HID lamp connects the N end of input ac power ~ UIN, one end also ground connection after common mode capacitance Cy of this new HID lamp.
Remarkable advantage of the present invention is:
(1) input ac power ~ UIN is connected between the points of common connection of the first differential mode inductance L1 and the second differential mode inductance L2 and new HID lamp, directly presents new HID lamp with AC-AC forceful electric power.
(2) own experience of the fault material object of HID lamp electric ballast is dissected in accumulation for many years, and statistics fault about 1/3rd is damaged by electronic power switch and caused; The present invention uses the first differential mode inductance L1 and the second differential mode inductance L2 to realize a times current effect, effectively reduces the current stress of electronic power switch.Again under attention cost performance prerequisite, reasonable adaptive high-voltage large current electronic power switch pipe, and by the real the lowest point switch ZVZCS Sofe Switch of single-chip microprocessor MCU control realization, taken precautions against voltage stress damage further, promoted reliability.
(3) add up failure rate about 1/4th from electrochemical capacitor, reason is that electrochemical capacitor is unreliable, for sensitivity and the vicious circle thereof of temperature, so the present invention, without electrochemical capacitor, realizes " all solid state ".Effective lifting reliability, realizes more than the 50000 hours targets without damage.
(4) HID lamp electric ballast fault is investigated, statistics fault 1/5th occurs in IC weak current part, especially low-tension supply VCC causes the fault that integrated circuit (IC or MCU) is powered, the present invention does full wave and voltage doubling rectification by the secondary induction coil NV of the first differential mode inductance L1 and the second differential mode inductance L2 after starting, obtain self-powered low-tension current source, power to single-chip microprocessor MCU after voltage stabilizing didoe ZV voltage stabilizing, make the VCC pin low pressure weak electrical loop of single-chip microprocessor MCU also without electrochemical capacitor, promote reliability.
(5) after generally traditional bridge rectifier, using big capacity electrolyte capacitor energy storage, is in the little period in order to solve before and after AC power zero passage, and power supply stops destroying circuit working continuity to circuit energy regenerative.And the present invention is when input ac power zero passage, namely the instantaneous voltage of safety electric capacity Cx is zero, at this moment C1 and C2 and S1 and S2 forms the normal operation of LLC topology, and be " the LLC topology without straight-through harm ", solve the discrete unreliability problem of AC power zero passage Energy transfer of conventional bridge rectification.
(6) the first differential mode inductance L1 among the present invention and the second differential mode inductance L2 has the effect of " times electric current BUCK ", effectively reduces the current stress of electronic power switch, also just reduces the cost of high-tension electricity electronic switch.
(7) by the first differential mode inductance L1 and the second differential mode inductance L2 and rectifier diode D1-D4 and storage capacitor C1 and C2, realize the energy regenerating to electric ballast endophyte clutter of the present invention, effective THD% and electromagnetic compatibility conduction EMC that suppressed disturbs, reduce electric network pollution, make again the electric work efficiency E of electric ballast of the present invention
ffeffective lifting.With stylish HID lamp electrode one end through common mode capacitance Cy ground connection, reduce EMC interference level.
(8) 20KHZ ac high frequency lamp current is modulated with AC power low frequency (50HZ/60HZ), the effectively new HID lamp generation acoustic resonance of degraded; When the Dead Time that electronic power switch S1 and S2 ends all simultaneously, there is 100HZ (or 120HZ) times voltage DC rectification, the DC component of its rectification and 20KHZ ac high frequency lamp current is equidirectional flows through new HID lamp electric arc, helpful to stablizing of electric arc, also effectively constrain the upheaval of acoustic resonance; Whenever electronic power switch S1 or S2 by ON transitions be cut-off moment, " i.e. the active APFC of doublebeat " process, this doublebeat active APFC direct current is two-way, with high frequency lamp current direction same-phase, more effective stable arc, by sunglasses shooting lamp electric arc an action shot, susceptible of proof lamp electric arc in almost linear quite stably, with the shake of traditional HID lamp electric arc swing even twist compared with greatly stable.
Accompanying drawing explanation
Fig. 1 is the control logic figure of the numerical control method of pure solid-state new HID lamp electric ballast.
Fig. 2 is the circuit theory diagrams of the embodiment of the present invention 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described, but does not form limiting the scope of the invention.
As shown in Figure 1, the numerical control method of pure solid-state new HID lamp electric ballast,
Connect in the current supply circuit of new HID lamp input ac power ~ UIN, forms the AC-AC topology that forceful electric power directly presents new HID lamp;
Before new HID lamp starter, at alternating current positive half wave, input ac power ~ UIN is charged to the first storage capacitor C1 by AC-DC times of voltage commutation; Half-wave is born at alternating current, input ac power ~ UIN is charged to the second storage capacitor C2 by AC-DC times of voltage commutation, DC bus-bar voltage is that the direct voltage UC1 of the first storage capacitor C1 and the direct voltage UC2 forward overlapped in series of the second storage capacitor C2 form, for the new HID lamp of starter;
When after new HID lamp starter, first electronic power switch S1 and the second electronic power switch S2 is controlled by single-chip microprocessor MCU symmetrical operation respectively, realize new HID lamp electric current high frequency positive half wave by direct voltage UC1 series connection input ac power ~ UIN to power, realize new HID lamp electric current high frequency negative half-wave by direct voltage UC2 series connection input ac power ~ UIN and power; The Dead Time all ended whenever above-mentioned two electronic power switches is afterflow process, and this afterflow process is Active Power Factor Correction APFC process, makes new HID lamp output-constant operation;
First differential mode inductance L1 and the second differential mode inductance L2 is connected in new HID lamp electric current high frequency positive half wave current supply circuit and new HID lamp electric current high frequency negative half-wave current supply circuit respectively, and the mutual inductance effect of the two forms times current effect and acts on above-mentioned symmetrical operation process and afterflow process respectively.
Also comprise the method for stable input electric power: the output current and the output voltage that are sampled input ac power ~ UIN by the first single-chip microprocessor MCU 1 respectively, through carrying out contrast computing with the rated input power of setting, comparison result is transported to single-chip microprocessor MCU, single-chip microprocessor MCU makes dynamic adjustments to the duty cycle signals of driving first electronic power switch S1 and the second electronic power switch S2 respectively according to comparison result, and input electric power is stablized.
Also comprise the method for stable lamp power: second singlechip MCU2 samples lamp current and modulating voltage respectively, through carrying out contrast computing with the lamp rated power of setting, comparison result is transported to single-chip microprocessor MCU, single-chip microprocessor MCU makes dynamic adjustments to the duty cycle signals of driving first electronic power switch S1 and the second electronic power switch S2 respectively according to comparison result, makes lamp power stability.
Embodiment 1:
As shown in Figure 2, the circuit of the numerical control method of the pure solid-state new HID lamp electric ballast described in employing, comprises AC-DC times of voltage commutation charge circuit and symmetrical operation current circuit;
1., an AC-DC times voltage commutation charge circuit work in electronic power switch S1 and S2 all not operating before, comprising:
The charging closed-loop path of the first storage capacitor C1: when the positive half wave of input ac power ~ UIN, alternating current is divided into two-way after holding output by the L of input ac power ~ UIN, from the different name end of the first differential mode inductance L1 to Same Name of Ends, then charge to the first storage capacitor C1 in one road after the first rectifier diode D1 rectification; From the Same Name of Ends of the second differential mode inductance L2 to different name end, then charge to the first storage capacitor C1 in another road after the 3rd rectifier diode D3 rectification; The charging current of the first storage capacitor C1 flows through the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, the parallel branch of starting capacitor CP and starter resistance RP successively, get back to the N end of input ac power ~ UIN, make the first storage capacitor C1 obtain direct voltage UC1;
The charging closed-loop path of the second storage capacitor C2: when the negative half-wave of input ac power ~ UIN, alternating current is held by the N of input ac power ~ UIN and is exported, flow through the parallel branch of the parallel branch of starting capacitor CP and starter resistance RP, high frequency current limiting capacitance CS and current-limiting resistance RS successively, after the second storage capacitor C2 charges, be divided into two-way, a road returns the L end of input ac power ~ UIN after the second rectifier diode D2 rectification from the different name end of the second differential mode inductance L2 to Same Name of Ends; Return the L end of input ac power ~ UIN from the Same Name of Ends of the first differential mode inductance L1 to different name end after another Lu Jing tetra-rectifier diode D4 rectification; The second storage capacitor C2 is made to obtain direct voltage UC2;
DC bus-bar voltage is that direct voltage UC1 and direct voltage UC2 forward overlapped in series form, for the new HID lamp of starter;
Because the first storage capacitor C1 is equal with the capacitance of the second storage capacitor C2, when input ac power ~ UIN is 100Vac to 280Vac scope after above-mentioned times of voltage commutation, direct voltage UC1 and direct voltage UC2 is 283 volts to 792 volts.First storage capacitor C1 and the second storage capacitor C2 selects on-liquid electrochemical capacitor, electric pressure 1000VDC, meets the need of new HID lamp starter and stable operation.
Obtaining DC bus-bar voltage is 565.6 volts to 1584 volts, more than withstand voltage selection 1600 volts of grades of first electronic power switch S1 and the second electronic power switch S2.
Starting capacitor CP is that new HID lamp triggers the work of short wink, and select more than 103/3KV grade high-frequency and high-voltage electric capacity, after new HID lamp starter, the parallel branch of starting capacitor CP and starter resistance RP is deactivated automatically.
High frequency current limiting capacitance CS capacitive reactance XC, series connection high frequency current-limiting inductance Lr is as the high frequency current-limiting impedance function of HID lamp, " poly-third film ac capacitor " voltage withstand class that high frequency current limiting capacitance CS selects tangent loss angle less is interchange 630Vac to 750Vac, the adaptive HID lamp electric current of capacitance.
Starter resistance RP and current-limiting resistance RS is respectively, and is the bleeder resistance of starting capacitor CP and high frequency current limiting capacitance CS, all selects 1M Ω, 1KV resistance.
All diodes are withstand voltage 1000 volts of high-frequency diodes, and current class is adaptive by new HID lamp electric current.
2., symmetrical operation current circuit is the first electronic power switch S1 and the second electronic power switch S2 current circuit when being controlled by single-chip microprocessor MCU symmetrical operation respectively, comprises new HID lamp electric current high frequency positive half wave current supply circuit, the first continuous current circuit, new HID lamp electric current high frequency negative half-wave current supply circuit and the second continuous current circuit;
New HID lamp electric current high frequency positive half wave current supply circuit comprises: when the first electronic power switch S1 is controlled by the period Δ ts1 of single-chip microprocessor MCU high frequency duty ratio dq signal conduction and the second electronic power switch S2 cut-off, the operating voltage of the first electronic power switch S1, be the instantaneous value of direct voltage UC1 plus/minus input ac power ~ UIN, its limit is
so the first electronic power switch S1 and the second electronic power switch S2 selects voltage withstand class more than 1600 volts; The first electronic power switch S1 conduction pulses sense of current, determine the new HID lamp electric current high frequency positive half wave sense of current, first pulse current flows out from the anode of the first storage capacitor C1, flow through the first electronic power switch S1, the parallel branch of Same Name of Ends to different name end, safety electric capacity Cx and input ac power ~ UIN of the first differential mode inductance L1, the parallel branch of new HID lamp, high frequency current-limiting inductance Lr, high frequency current limiting capacitance CS and current-limiting resistance RS successively, get back to the negative terminal of the first storage capacitor C1; Safety electric capacity Cx two ends input ac power in loop ~ UIN input current energy is got involved, effectively the acoustic resonance harm of the new HID lamp of compacting.
First continuous current circuit comprises: the high frequency duty ratio dq signal ended being controlled by single-chip microprocessor MCU as the first electronic power switch S1 transfers cut-off to and Dead Time that the second electronic power switch S2 still ends, because the sense of current of the first differential mode inductance L1 can not suddenly change, and there is afterflow process, its essence is the instantaneous process that one of Active Power Factor Correction APFC doublebeat is clapped, the first differential mode inductance L1 afterflow is given by the 4th rectifier diode D4, freewheel current flows out from the negative pole of the 4th rectifier diode D4, flow through the Same Name of Ends of the first differential mode inductance L1 successively to different name end, the parallel branch of safety electric capacity Cx and input ac power ~ UIN, new HID lamp, high frequency current-limiting inductance Lr, the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, charge to the second storage capacitor C2 again, finally get back to the positive pole of the 4th rectifier diode D4, be equivalent to BCUK topology Active Power Factor Correction APFC process, difference flows through input ac power ~ UIN around here, also Active Power Factor Correction APFC process is sealed in just because of input ac power ~ UIN, improve power factor PF, reduce input power current harmonics THD, improve electric work efficiency E
ff.
New HID lamp electric current high frequency negative half-wave current supply circuit comprises: when the second electronic power switch S2 is controlled by single-chip microprocessor MCU high frequency duty ratio
signal conduction and first electronic power switch S1 end period Δ ts2, the operating voltage of the second electronic power switch S2 is the instantaneous value of direct voltage UC2 plus/minus input ac power ~ UIN, and its limit is
the second electronic power switch S2 conduction pulses sense of current, determines new HID lamp electric current high frequency negative half-wave current direction; Second pulse current flows out from the anode of the second storage capacitor C2, flow through the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS, high frequency current-limiting inductance Lr, the new parallel branch of HID lamp, safety electric capacity Cx and input ac power ~ UIN, the Same Name of Ends of the second differential mode inductance L2 successively to different name end, the second electronic power switch S2, get back to the negative terminal of the second storage capacitor C2;
Second continuous current circuit comprises: when the second electronic power switch S2 is controlled by single-chip microprocessor MCU high frequency duty ratio
signal ended transfers cut-off and Dead Time that the first electronic power switch S1 still ends to, because the sense of current of the second differential mode inductance L2 can not suddenly change, and there is afterflow process, its essence is another instantaneous process clapped of Active Power Factor Correction APFC doublebeat, the second differential mode inductance L2 afterflow is given by the 3rd rectifier diode D3, freewheel current flows out from the negative pole of the 3rd rectifier diode D3, after charging to the first storage capacitor C1, flow through the parallel branch of high frequency current limiting capacitance CS and current-limiting resistance RS successively, high frequency current-limiting inductance Lr, new HID lamp, the Same Name of Ends of the second differential mode inductance L2 is to different name end, get back to the positive pole of the 3rd rectifier diode D3, same, because input ac power ~ UIN seals in Active Power Factor Correction APFC process, improve power factor PF, reduce input power current harmonics THD, improve electric work efficiency E
ff.
The effect of the first differential mode inductance L1 and the second differential mode inductance L2 is:
The existence of the first differential mode inductance L1 and the second differential mode inductance L2, relieves the danger that the first electronic power switch S1 and the second electronic power switch S2 is straight-through.Although due to the first electronic power switch S1 and the second electronic power switch S2 be controlled by respectively single-chip microprocessor MCU high frequency duty cycle signals dq and
but also there is Dead Time, i.e. above-mentioned Active Power Factor Correction APFC doublebeat process time, be impossible conducting simultaneously both original.But once wherein a certain electronic power switch pipe punctures and don't burns; just likely there is the straight-through harm of LLC; so; seal in the first differential mode inductance L1 and the second differential mode inductance L2 and isolate the first electronic power switch S1 and the second electronic power switch S2 is very important; practice simulation LLC leads directly to fault; find that through current is very limited; and single-chip microprocessor MCU has enough time to start abnormal protection; stop driving first electronic power switch S1 and the second electronic power switch S2; and send numerical control instruction, to identify that fault part is in order to giving rapid maintenance in time.
Times current effect:
At period Δ ts1, first pulse current flows into the first differential mode inductance L1 Same Name of Ends, flow out from different name end, second differential mode inductance L2 produces induced current and flows into the second differential mode inductance L2 different name end by diode D2, flow out from Same Name of Ends, with above-mentioned first pulse current, synthesize new HID lamp electric current high frequency positive half wave electric current.What the mutual inductance of Here it is the first differential mode inductance L1 and the second differential mode inductance L2 produced doubly flows effect.
In like manner, period Δ ts2 and Active Power Factor Correction APFC doublebeat process also exist the first differential mode inductance L1 and the second differential mode inductance L2 mutual inductance produce doubly flow effect.
Times current effect effectively reduces the current stress of the first electronic power switch S1 and the second electronic power switch S2, improves the cost performance of electric ballast of the present invention.
Described first electronic power switch S1 is connected single-chip microprocessor MCU respectively with the control end of the second electronic power switch S2.
Also comprise output current and output voltage that the first single-chip microprocessor MCU 1 samples input ac power ~ UIN respectively, through carrying out contrast computing with the rated input power of setting, comparison result is transported to single-chip microprocessor MCU, single-chip microprocessor MCU makes dynamic adjustments to the duty cycle signals of driving first electronic power switch S1 and the second electronic power switch S2 respectively according to comparison result, and input electric power is stablized.
Also comprise second singlechip MCU2 and sample lamp current and modulating voltage respectively, through carrying out contrast computing with the lamp rated power of setting, comparison result is transported to single-chip microprocessor MCU, single-chip microprocessor MCU makes dynamic adjustments to the duty cycle signals of driving first electronic power switch S1 and the second electronic power switch S2 respectively according to comparison result, makes lamp power stability.
Also comprise the self-powered circuit of single-chip microprocessor MCU: by the secondary induction coil NV of the first differential mode inductance L1 and the second differential mode inductance L2 through full-wave voltage doubler, obtain low-tension current source, then connect the VCC pin of single-chip microprocessor MCU after voltage stabilizing didoe ZV voltage stabilizing.
One end of new HID lamp connects the N end of input ac power ~ UIN, and one end also ground connection after common mode capacitance Cy of this new HID lamp, disturbs for reducing EMC.
Also be provided with source electronic starter J in circuit, its energy takes from new HID lamp two ends, controls obtaining of active electronic starter J electric by TVS diode, when new HID lamp is normally run, new HID lamp voltage is less than the breakover voltage of TVS diode, and active electronic starter J must not be electric, after new HID lamp arc extinction, alternating voltage between two electrodes of new HID lamp phase, equal the transient voltage UCP at starting capacitor CP two ends, make TVS diode conducting, active electronic starter J obtains electric, Ignition capacitor is stored to through exchanging a times voltage commutation, discharge to armature winding Nj1 and armature winding Nj2 through electric capacity Cj1 and electric capacity Cj2 respectively again, form the resonance of multiple frequency, secondary winding and high frequency current-limiting inductance Lr produce induced voltage Ulr, when the voltage magnitude of induced voltage Ulr and width meet new HID lamp starter energy requirement, the energy of induced voltage Ulr is coupled to two electrodes in new HID lamp by starting capacitor CP, draw the new HID lamp electric arc of alkene.
Input ac power ~ UIN place in circuit again after electromagnetic interface filter.
Single-chip microprocessor MCU also by detecting multiple abnormal protection signal, implements multiple aptitude manner abnormal protection; Further coupling " carrier remote control " and " wireless remotecontrol ", realize intelligentized control method light modulation.
Claims (10)
1. the numerical control method of pure solid-state new HID lamp electric ballast, is characterized in that:
To connect in the current supply circuit of new HID lamp input ac power (~ UIN), form the AC-AC topology that forceful electric power directly presents new HID lamp;
Before new HID lamp starter, at alternating current positive half wave, input ac power (~ UIN) is charged to the first storage capacitor (C1) by AC-DC times of voltage commutation; Half-wave is born at alternating current, input ac power (~ UIN) is charged to the second storage capacitor (C2) by AC-DC times of voltage commutation, DC bus-bar voltage is that the direct voltage (UC1) of the first storage capacitor (C1) and direct voltage (UC2) the forward overlapped in series of the second storage capacitor (C2) form, for the new HID lamp of starter;
When after new HID lamp starter, first electronic power switch (S1) and the second electronic power switch (S2) are controlled by single-chip microcomputer (MCU) symmetrical operation respectively, realized new HID lamp electric current high frequency positive half wave powered by direct voltage (UC1) input ac power (~ UIN) of connecting, realized new HID lamp electric current high frequency negative half-wave powered by direct voltage (UC2) input ac power (~ UIN) of connecting; The Dead Time all ended whenever above-mentioned two electronic power switches is afterflow process, and this afterflow process is Active Power Factor Correction APFC process, makes new HID lamp output-constant operation;
First differential mode inductance (L1) and the second differential mode inductance (L2) are connected in new HID lamp electric current high frequency positive half wave current supply circuit and new HID lamp electric current high frequency negative half-wave current supply circuit respectively, and the mutual inductance effect of the two forms times current effect and acts on above-mentioned symmetrical operation process and afterflow process respectively.
2. the numerical control method of pure solid-state new HID lamp electric ballast according to claim 1, it is characterized in that, also comprise the method for stable input electric power: the output current and the output voltage that are sampled input ac power (~ UIN) by the first single-chip microcomputer (MCU1) respectively, through carrying out contrast computing with the rated input power of setting, comparison result is transported to single-chip microcomputer (MCU), single-chip microcomputer (MCU) makes dynamic adjustments to the duty cycle signals of driving first electronic power switch (S1) and the second electronic power switch (S2) respectively according to comparison result, input electric power is stablized.
3. the numerical control method of pure solid-state new HID lamp electric ballast according to claim 1, it is characterized in that, also comprise the method for stable lamp power: second singlechip (MCU2) samples lamp current and modulating voltage respectively, through carrying out contrast computing with the lamp rated power of setting, comparison result is transported to single-chip microcomputer (MCU), single-chip microcomputer (MCU) makes dynamic adjustments to the duty cycle signals of driving first electronic power switch (S1) and the second electronic power switch (S2) respectively according to comparison result, makes lamp power stability.
4. the numerical control method of pure solid-state new HID lamp electric ballast according to claim 1, it is characterized in that, described new HID lamp electric current high frequency positive half wave current supply circuit comprises the parallel branch of the first storage capacitor (C1), the first electronic power switch (S1), the first differential mode inductance (L1), input ac power (~ UIN), new HID lamp, high frequency current-limiting inductance (Lr), high frequency current limiting capacitance (CS) and the current-limiting resistance (RS) of connecting successively;
New HID lamp electric current high frequency negative half-wave current supply circuit comprises parallel branch, the high frequency current-limiting inductance (Lr), newly HID lamp, input ac power (~ UIN), the second differential mode inductance (L2), the second electronic power switch (S2) of the second storage capacitor (C2), high frequency current limiting capacitance (CS) and the current-limiting resistance (RS) of connecting successively.
5. the numerical control method of pure solid-state new HID lamp electric ballast according to claim 4, it is characterized in that, the different name end of described first differential mode inductance (L1) is connected with the Same Name of Ends of the second differential mode inductance (L2).
6. the circuit of the numerical control method of the pure solid-state new HID lamp electric ballast adopting one of claim 1-5 described, is characterized in that, comprise AC-DC times of voltage commutation charge circuit and symmetrical operation current circuit;
1., an AC-DC times voltage commutation charge circuit work in electronic power switch S1 and S2 all not operating before, comprising:
The charging closed-loop path of the first storage capacitor (C1): when the positive half wave of input ac power (~ UIN), alternating current is divided into two-way after holding output by the L of input ac power (~ UIN), from the different name end of the first differential mode inductance (L1) to Same Name of Ends, then charge to the first storage capacitor (C1) in one road after the first rectifier diode (D1) rectification; From the Same Name of Ends of the second differential mode inductance (L2) to different name end, then charge to the first storage capacitor (C1) in another road after the 3rd rectifier diode (D3) rectification; The charging current of the first storage capacitor (C1) flows through high frequency current limiting capacitance (CS) and the parallel branch of current-limiting resistance (RS), the parallel branch of starting capacitor CP and starter resistance RP successively, get back to the N end of input ac power (~ UIN), make the first storage capacitor (C1) obtain direct voltage UC1;
The charging closed-loop path of the second storage capacitor (C2): when the negative half-wave of input ac power (~ UIN), alternating current is held by the N of input ac power (~ UIN) and is exported, flow through the parallel branch of starting capacitor CP and starter resistance RP successively, the parallel branch of high frequency current limiting capacitance (CS) and current-limiting resistance (RS), two-way is divided into after the second storage capacitor (C2) charging, one tunnel returns the L end of input ac power (~ UIN) after the second rectifier diode (D2) rectification from the different name end of the second differential mode inductance (L2) to Same Name of Ends, return the L end of input ac power (~ UIN) from the Same Name of Ends of the first differential mode inductance (L1) to different name end after another Lu Jing tetra-rectifier diode (D4) rectification, the second storage capacitor (C2) is made to obtain direct voltage UC2,
DC bus-bar voltage is that direct voltage (UC1) and direct voltage (UC2) forward overlapped in series form, for the new HID lamp of starter;
2., symmetrical operation current circuit is the first electronic power switch (S1) and the second electronic power switch (S2) current circuit when being controlled by single-chip microcomputer (MCU) symmetrical operation respectively, comprises new HID lamp electric current high frequency positive half wave current supply circuit, the first continuous current circuit, new HID lamp electric current high frequency negative half-wave current supply circuit and the second continuous current circuit;
New HID lamp electric current high frequency positive half wave current supply circuit comprises: when when (S1) conducting of the first electronic power switch, the second electronic power switch (S2) ends, first pulse current flows out from the anode of the first storage capacitor (C1), flow through the first electronic power switch (S1) successively, the Same Name of Ends of the first differential mode inductance (L1) is to different name end, the parallel branch of safety electric capacity (Cx) and input ac power (~ UIN), new HID lamp, high frequency current-limiting inductance (Lr), the parallel branch of high frequency current limiting capacitance (CS) and current-limiting resistance (RS), get back to the negative terminal of the first storage capacitor (C1),
First continuous current circuit comprises: when the first electronic power switch (S1) transfers cut-off to and the Dead Time that still ends of the second electronic power switch (S2) by conducting, by the 4th rectifier diode (D4) to the first differential mode inductance (L1) afterflow, freewheel current flows out from the negative pole of the 4th rectifier diode (D4), flow through the Same Name of Ends of the first differential mode inductance (L1) successively to different name end, the parallel branch of safety electric capacity (Cx) and input ac power (~ UIN), new HID lamp, high frequency current-limiting inductance (Lr), the parallel branch of high frequency current limiting capacitance (CS) and current-limiting resistance (RS), charge to the second storage capacitor (C2) again, finally get back to the positive pole of the 4th rectifier diode (D4),
New HID lamp electric current high frequency negative half-wave current supply circuit comprises: when when (S2) conducting of the second electronic power switch, the first electronic power switch (S1) ends, second pulse current flows out from the anode of the second storage capacitor (C2), flow through the parallel branch of high frequency current limiting capacitance (CS) and current-limiting resistance (RS) successively, high frequency current-limiting inductance (Lr), new HID lamp, the parallel branch of safety electric capacity (Cx) and input ac power (~ UIN), the Same Name of Ends of the second differential mode inductance (L2) is to different name end, second electronic power switch (S2), get back to the negative terminal of the second storage capacitor (C2),
Second continuous current circuit comprises: when the second electronic power switch (S2) transfers cut-off to and the Dead Time that still ends of the first electronic power switch (S1) by conducting, by the 3rd rectifier diode (D3) to the second differential mode inductance (L2) afterflow, freewheel current flows out from the negative pole of the 3rd rectifier diode (D3), after the first storage capacitor (C1) charging, flow through the parallel branch of high frequency current limiting capacitance (CS) and current-limiting resistance (RS) successively, high frequency current-limiting inductance (Lr), new HID lamp, the Same Name of Ends of the second differential mode inductance (L2) is to different name end, get back to the positive pole of the 3rd rectifier diode (D3),
Described first electronic power switch (S1) is connected single-chip microcomputer (MCU) respectively with the control end of the second electronic power switch (S2).
7. the circuit of the numerical control method of pure solid-state new HID lamp electric ballast according to claim 6, it is characterized in that, also comprise the circuit of stable input electric power: two sampling ends of the first single-chip microcomputer (MCU1) connect output current and the output voltage of input ac power (~ UIN) respectively, output connects the input of single-chip microcomputer (MCU), and two outputs of single-chip microcomputer (MCU) connect the control end of the first electronic power switch (S1) and the second electronic power switch (S2) respectively.
8. the circuit of the numerical control method of pure solid-state new HID lamp electric ballast according to claim 6, it is characterized in that, also comprise the circuit of stable lamp power: two sampling ends connecting lamp electric current and modulating voltage respectively of second singlechip (MCU2), output connects the input of single-chip microcomputer (MCU), and two outputs of single-chip microcomputer (MCU) connect the control end of the first electronic power switch (S1) and the second electronic power switch (S2) respectively.
9. the circuit of the numerical control method of pure solid-state new HID lamp electric ballast according to claim 6, it is characterized in that, also comprise the self-powered circuit of single-chip microcomputer (MCU): by the secondary induction coil (NV) of the first differential mode inductance (L1) and the second differential mode inductance (L2) through full-wave voltage doubler, obtain low-tension current source, then connect the VCC pin of single-chip microcomputer (MCU) after voltage stabilizing didoe (ZV) voltage stabilizing.
10. the circuit of the numerical control method of pure solid-state new HID lamp electric ballast according to claim 6, it is characterized in that, also comprise the circuit reducing EMC interference: one end of new HID lamp connects the N end of input ac power (~ UIN), one end also ground connection after common mode capacitance (Cy) of this new HID lamp.
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